I am looking for a way of assigning shortcuts key combos so I
can (much) faster manually build an index. I want a shortcut so
that I can select a word/phrase and then hit the shortcut and add
it to the index.

Failing that, a toolbar button would also be good, but I also
can't find one of those.

Option 3, is to use a system macros application that records
Windows events, like key presses and mouse clicks -- I use Quick
Macros -- so I tried , but it did not work.